Process for making helicoid or spiral conveyers.



U. 0. GUSTAVSEN. Pnoonss ron MAKING 1121.100111 on srnm. coNvEYnns.

APPLICATION FILED APB. 23.1901?.

908,859. I Patented Jan 5,1909.

UNITED STATES ninpss o. oUs'rAvsEN, or COLUMBUS, cino, issieivoii, sr masiva Assiems'is, `Torna JEFFREY MANUFACTURING Qosmio'. .11. comemos QFQHIQJ (iF-FICE.

rnoenssf iron Harina on emu. comuna.

Bpecication of Patent.

Wlaw W39 rasantes nn. s, 1909.

.'m. 1m .nana c v To all whom 'it concern:

Be it known thatI, CHARLES O. GU's'rAvl. sEN, a citizen of the United States, residin at Columbus, in the county of Franklin an State of Ohio, have invented certain new and useful Improvements in Processes for Making Helicoid or Spiral Conveyers, of which the following is a specification.

This invention relates Amore artieiilarly to making helicoids or spirals om strips of steel or other .suitable metal, such devices being used for conveyers or like pur osea. Its objects" are to form a spiral or he icoid from a strip or bar of suitable material' of uniform thickness so that the resulting spiral or helicoid will be of uniform thickness, or so that it will be thicker a't the outer edge than at the inner edge; or to form a spiral or helicoid from a strip which is thicker at one edge than at the other edge, the resulting spiral maintaining the same relative form of cross-section.

Further objects will be pointed out hereafter in the following description.

In the accompanying drawings illustrating this invention, Figure 1 represents a side view partly broken away, of conical rolls used in rolling helicoids according to this invention; Fig. 2 is an end view showing an arfrom; Fig. r

rangement of the guides for feeding the material to .the rolls and taking it away there 3 is a view showin a section of the strip om which a helicoid 1s to be rolled, thedotted lines representing the cross-section of the metal after' it has been formed into a spiral of uniform thickness; Fig. 4 represents a cross-section of material of another form', the dotted lines showin the shape of the cross-section of the resu ting s iral; Fig. 5 shows a cross-section of a spira or helicoid with its outer edge of greater thickness than its inner edge, the latter being the edge nearv est to the pipe or shaft upon which the'spiral is usually secured, this form being made according to the resent invention from a strip of uniform thic ess; and Fig. 6 represents a portion of completed spiralhaving its crosssection increasing gradually toward its outer e e. I e

eretofore, the usual method of rolling spirals from continuous strips has been to form the spiral by elongating and thinning the outer edge of thestrips as the s iral was l being formed. For instance, if t e strip ,from which the spiral was made was of uni-.- form thickness, then the resulting spiral would have ,its outer edge considerably thinner than its inner edge; or if the strip were thicker at one., edge than the other, then the resulting spiral would be of uniform thickness. ccording to this improved process, spirals or helicoids are rolled from a continuous strip of suitable metal in such a way thatl the resulting spiral formed from a strip of uniform thickness may itself be of uniform thickness, or may be thicker at its outer edge than at its inner edge; and in a similar way,

than the ot er, a s viral may formed having its outer edge thic er than its inner edge in` a manner corresponding f to -the stock from which it is rolled.

pair of rolls of the form which I prefer to use 1n carrying out this process. .7 represents a larg? roll; and 8, a smaller roll which coacts wit instance, as Yshown and described in my previous patent No. 760,448 of May 24, 1904. The roll 7 isy rovided with a peripheral groove 9 into which extends speri heral or ling 10 does not extend to the full depth of the groove 9, but leaves a passage or box-pass 11 between its -outer surface and the bottom of the groove 9. This pass may be rectangu-` lar in outline, as when a helicoidbf uniformI thickness is to be produced, or may be wider at its outer edge than atits inner ed e as shown inthe drawing so that the resu ting spiral will be thicker at its` outer edge than at its inner edge.

The feed guide is set at such an an le to a lplano passing through the centers of t ye rolls and through the box-pass, that the material will be presented to the rolls so that they will crowd or squeeze the material across the width of the stock bar as it is fed to them, so that the helicoid produced ma be of uniform thickness or may even be thic er at its outer edge than at its inner edge. In other Words, instead of simply making the material thinner at the outer edge in order'to allow additional length for the s iral, the material is crowded across the Widt of the stock to make up for the additional le h, the thickness remaining substantially t e saine, or even greater at As shown in the drawings, Fig. 1 shows a l using a stri of stock havin one edge thicker,

the lar e roll. These rolls maybe erv ranged and riven in any desiredlmaniier, .for

annular ring or portion 1.0 on the ro 8. The

the outer edge.

' to the pass,

guide 17.may'be supported in any' desired manner from the frame of the machine.

'l'he discharge or forming guide 18 is made in the form of the helicoid to be produced,

rolls, thus preventing pleted by passing throughv the formi-ng and strips the material directly from the material to Wrap around either of the rolls.

This guide also may be supported in any .de-l sired manner,

as from va cross-bar 1 9 secured to the frame of the machine.

Having this preferred form of machine for carrying out the principal ste s in my improved method, this methol consists in orming a helicoid from a strip of suitable material, preferably iron or steel, either hot or cold, by feeding said metal to suitable rolls preferably of conical form having a properly shaped pass, and by feeding it to suc-h rolls in such a manner that the resulting helicoid vv ill be either of uniform thickness or thicker at its outer edge than'at its inner edge when formed from stock of uniform thickness. the stock at a suitable angle to the ass. Likevs ise, if the stock from which the hellcoid v is to be'formed is of tapering cross-section, or

thicker at one edge than at the other edge, by my im roved method the resulting helicoid may e proportionately thicker at .its outer edge than at its inner edge than when formed of stock of uniform thickness. In carrying out this process, the material is preferably heated in.a suitable furnace to a roper degree of temperature, and is then ed through 'the feed guide directly to the rolls which crowd'the material from the inner toWard .the outer edge and simultaneously elongate the outer edge suiiiciently to form the desired helicoid or spiral. The spiral 0 1 helicoid thus vformed is trued up oI'co r(ri1/l 251.11 e which has the shape of the resultin spiral I which is to be formed. As the spira comes;

from the machine, it is received 'on-a mandrel than at the inner end which is adjacent the material travels, asv it any tendency of ,thel

rlhis manner being to present or pipe 21 which suplprts it until it Vbecomes suiliciently cooled to e removed.

This application is a division of my former application for a patent for helicoid or spiral cconveyer and filed March 13, 1905; Serial No. 249,803.

I do not claim herein the article or the' machine for making same, but

WhatI claim and desire to secure by Letters Patent is:

1. A process of forming metallic spirals or helicoids fromv a continuous strip or which consists in feeding a strip of suitable material to a air of substantially conical rolls at an ang e of less than 90 degrees to- Wards the smaller ends of said rolls to a pitch line or line common to saidvrolls, and maintaining the strip in such feeding plosition as it is being passed through said ro s. i

2. A process of forming spiral or helicoids which consists in forming a ight from a strip of `metal of uniform thickness by presenting and maintaining the strip as it is fed to a pair of conical rolls, at an acute angle to the pitch line or line common to the tWo rolls, said Wards the apices of said rolls whereby the material of the strip is crowded across the Width thereof, While the outer edge is simultaneously elongated to form the spirals or helicoids.

3. 'lhe process of forming a conveyer flight or the like which consists in heating a stri of suitable metal of uniform thickness and tllen CHARLES o; GUSTAVSEN.

y Witnesses SADIE CLYMER,

` Y J. WHITE'.

machine for making the same,

bar,

angle being measured in the ydirection topassing said strip through a pass between.;

at right angles to the common tangent l 

